Microsoft already has operations in Iowa, and expects construction to begin in late 2013 with a scheduled completion deadline by the end of 2015. Microsoft will receive $20 million in tax credits to create 29 jobs, according to documents filed with the Iowa Economic Development Authority, which approved some tax incentives associated with the expansion on Friday.

And for the clean power buffs out there, hoping Microsoft might push the envelope with this expansion, it is making an effort, although not trying to purchase clean power. the company says it will offset the gross carbon emissions from this data center by purchasing an equivalent amount of renewable energy credits.